<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="" />
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>

    <!-- 页面主体区域 -->
    <el-container>

      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px' ">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <!-- 侧边栏菜单区 -->
        <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" 
        unique-opened  :collapse = "isCollapse" :collapse-transition="false" router 
        :default-active = "activePath">  
          <!-- 一级菜单 -->
          <el-submenu :index=" String( item.id ) " v-for="item in menuList" :key="item.id">
            <!-- 一级菜单的模板区 -->
            <template slot="title">
              <!-- 图标  -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>

            <!-- 二级菜单 -->
            <el-menu-item :index=" '/' + subItem.path " v-for="subItem in item.children" :key="subItem.id"
            @click="saveNavState( '/' + subItem.path )">
               <!-- 二级菜单的模板区 -->
            <template slot="title">
              <!-- 图标 -->
              <i class="el-icon-menu"></i>
              <!-- 文本 -->
              <span>{{subItem.authName}}</span>
            </template>
            </el-menu-item>

          </el-submenu>
          
        </el-menu>
      </el-aside>

      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>

    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
       // 左侧菜单数据
      menuList: [],

      iconsObj: {// 一级菜单的icon图标    
        // 147: 'el-icon-magic-stick',
        125: 'iconfont icon-users',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },

      //是否折叠
      isCollapse: false,

      //被激活的链接地址
      activePath: '',

    }
  },

  created(){
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
    // console.log(this);
  },

  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
    async getMenuList() {
      const {data: res} = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      // this.$message.success(res.meta.msg)
      this.menuList = res.data
      // console.log(res);
    },

    toggleCollapse() {
      this.isCollapse = ! this.isCollapse
    },
    //保存链接的激活状态， 保存到sessionStorage中
     saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
      // console.log(this);
      // console.log(this.$route.path)
    }
  },
}
</script>


<style lang="less" scoped>
.home-container {
  height: 100%;
}

//头部样式
.el-header {
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  background-color: #373d41;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      width: 60px;
      height: 60px;
      border-radius: 50%;
    }
    span {
      margin-left: 15px;
    }
  }
}

//侧边栏样式
.el-aside {
  background-color: #333744;

  .toggle-button {
  background: #4a5064;
  font-size: 10px;
  text-align: center;
  line-height: 24px;
  color: #fff;
  letter-spacing: 0.2em; //增加每个| 之间的距离
  cursor: pointer;
}

  .el-menu {
    border-right: none;

     .iconfont {
      padding-right: 10px;
    }
  }

}

.el-main {
  background-color: #eaedf1;
}




</style>>
